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Preparation of a metal-organic framework material used for natural-gas purification

A technology of organic frameworks and framework materials, applied in the direction of 2/12 organic compounds without C-metal bonds, gas fuels, zinc organic compounds, etc., can solve problems such as waste of cost and difficulty in separation

Active Publication Date: 2016-04-27
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Light aliphatic hydrocarbons are important industrial raw materials, but they are very difficult to separate due to their similar molecular size, molecular weight and boiling point
The traditional process is to use low-temperature distillation, but this method needs to be realized at a lower temperature and high pressure, which wastes a lot of cost

Method used

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  • Preparation of a metal-organic framework material used for natural-gas purification
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  • Preparation of a metal-organic framework material used for natural-gas purification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: the preparation method of zinc metal-organic framework material

[0011] Add bis(3,5-dicarboxyphenyl)phosphinic acid and zinc nitrate hexahydrate (ratio of substance amount is 10:1) to N,N'-dimethylformamide, ethanol and water (volume In a mixed solvent with a ratio of 1:1:1), the temperature was gradually raised to 85° C., reacted for 36 hours, cooled to room temperature, and filtered. Continuous soaking in acetone for 3 days, changing fresh acetone solution every 24 hours, and vacuum drying to obtain the zinc metal-organic framework material.

Embodiment 2

[0012] Example 2: Test of adsorption of methane gas by zinc metal-organic framework materials

[0013] On the specific surface and porosity analyzer, methane is passed into the adsorption cylinder containing 100mg of zinc metal-organic framework material at room temperature and normal pressure for adsorption test, and the adsorption capacity is 22.5cm 3 g -1 .

Embodiment 3

[0014] Example 3: Adsorption of propane by zinc metal-organic framework materials

[0015] On the specific surface and porosity analyzer, at room temperature and normal pressure, methane was passed into the adsorption cylinder containing 100 mg of zinc metal-organic framework material for adsorption test, and the adsorption capacity was 76 cm 3 g -1 According to the ideal adsorption solution theory (IAST) for equimolar two-component system, the selectivity coefficient of propane / methane is 285.1. Example 4: Test of adsorption of acetylene gas by zinc metal-organic framework materials

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Abstract

The invention provides preparation of a metal-organic framework material used for natural-gas purification. A microporous zinc-based zinc-organic framework material is prepared by a solvothermal synthesis method. The material is high in water stability, comprises bis(3,5-dicarboxyphenyl) phosphinate ions, zinc ions and a dimethyl ammonium cation, and is simple in preparation. The material has high adsorption capacities for light hydrocarbons comprising methane, ethylene, acetylene, ethane and propane at room temperature under atmospheric pressure. The methane can be selectively separated from the ethylene, the acetylene, the ethane and the propane through the material. The material can be used for natural-gas purification and is low in cost, convenient in operation and good in application effects.

Description

technical field [0001] The invention belongs to the technical field of gas adsorption and separation, and in particular relates to a preparation method of a metal-organic framework material based on metal zinc and its application in purifying natural gas. Background technique [0002] Natural gas is a relatively clean energy source, its main component is methane and contains a small amount of light aliphatic hydrocarbons and carbon dioxide. Light aliphatic hydrocarbons are important industrial raw materials, but they are very difficult to separate due to their similar molecular size, molecular weight and boiling point. The traditional process is the method of cryogenic distillation, but this method needs to be realized at a lower temperature and high pressure, which wastes a lot of cost. However, the method of adsorption separation can be realized at lower pressure and room temperature, which saves energy and is of great significance. Also, the water stability of the adsor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F3/06B01J20/22B01J20/30C10L3/10
CPCB01J20/226B01J2220/4812C07F3/003C10L3/101C10L3/104
Inventor 李兰曹荣林祖金
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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